Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d70c8a7af271612…

MALICIOUS

PDF

75.3 KB Created: 2021-03-24 08:50:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 295bad5f7a647ff5c1c7c737ce6928d8 SHA-1: e3d92584e2b78235454dd3d352d6a9fe766f1b2f SHA-256: 2d70c8a7af271612203fbdb95635ae1dc3593df88f8d856037229526e8423c8b
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which are hosted on disposable domains or use UTM parameters, indicating a link farm designed to direct users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://soxebez.ru/strik?utm_term=who+makes+magic+chef+microwaves PDF link annotation
    • https://cdn.sqhk.co/jigavozef/6iahghi/lucky_draw_online_app.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CDWhbqq/bamogapewinifusofenarilog.pdfIn PDF document text
    • https://rilemiwekeb.weebly.com/uploads/1/3/4/5/134599700/remolamivezowop_duwevirewiden.pdfIn PDF document text
    • https://nopetozu.weebly.com/uploads/1/3/4/5/134507327/eaee9.pdfIn PDF document text
    • https://cdn.sqhk.co/karapazepot/hgfvaii/87770116504.pdfIn PDF document text
    • https://cdn.sqhk.co/dimowitop/omuyyhh/rafunetipovabatowokob.pdfIn PDF document text
    • https://cdn.sqhk.co/xenotami/KYgcxrK/free_printable_editable_lesson_plan_template.pdfIn PDF document text
    • https://cdn.sqhk.co/sumavevop/5hao1Gi/giguvubiva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413007/normal_6017127b81c3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418167/normal_604e606151596.pdfIn PDF document text
    • https://cdn.sqhk.co/lusimalifa/YqJpZhb/44558770543.pdfIn PDF document text
    • https://fikosaxan.weebly.com/uploads/1/3/4/7/134753192/685821.pdfIn PDF document text
    • https://cdn.sqhk.co/buzaxelubot/Htidt8W/mozodifiboxunabena.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/miajfRM/spin_vegas_casino.pdfIn PDF document text
    • https://mefiwoteta.weebly.com/uploads/1/3/5/9/135956645/gilokopusarej-lexutigatija-xifigudewo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413693/normal_5fe99b53ac797.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413113/normal_5ff4cec56838c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408323/normal_5ffe46cc5fb10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gomakobez/full_crew_achievement_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/dusufubawobijuniredeveze.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/aarp_membership_benefits.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96F 5492 bytes
SHA-256: 995f04e16ed6392a07f7e0563ece815576628e668492976eff052a7e74e99886
font_01_sfnt_off0000fc15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC15 10500 bytes
SHA-256: 1d61605c2ce635a7c6830b46605c909a567b16b6edf4831edc770bc8389f4ba8

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